/*整体样式设置*/
body {
    background-color: #CCCCCC;
    margin: 0px auto;
    max-width: 900px;
    text-align: center;
}
header, footer {
    background-color: orange;
    color: #FFFFFF;
}
header{
	padding:30px;
    margin-top: 20px;
}
header h1 {
    font-size: 40px;
    margin: 0px;
}
footer{
	padding:15px;
}
footer h2 {
    font-size: 14px;
}
/*<div id="container">的内部样式设置*/
#container {
    background-color: #FFF;
}
section {
    width: 60%;
    padding: 30px;
	margin:auto;
}
article {
    background-color: #eee;
    padding: 10px;
}
article header, article footer {
    padding: 5px;
}
article h1 {
    font-size: 18px;
}
select, button {
    margin: 10px;
    font-size: 16px;
}